In recent years, our knowledge of the most violent phenomena in the Universe has progressed impressively thanks to the advent of new detectors for γ-ray, on both the ground and in orbit. At the furthest extremes of this observational energy window, we have now discovered more than a thousand sources in the soft γ-ray band (20–100 keV) and more than 200 in the TeV band. Connecting the properties of sources that are seen at both these extremes is very important, as it allows us to discriminate between various emission scenarios and, in turn, fully understand their nature.
By employing a spatial cross correlation technique, we compared the INTEGRAL/IBIS catalogue and TeV all-sky data in search of secure or likely associations.
Although this analysis is based on a subset of the INTEGRAL all-sky observations (1000 orbits), we find that there is a significant correlation: 39 objects (∼20% of the VHE γ-ray catalogue) show emission in both soft γ-ray and TeV wavebands. We will briefly show the various typology of the sources resulted from this cross-correlation.
The full INTEGRAL database, now comprising almost 20 years of data and available at OAS, will represent an important legacy that will be useful for the Cherenkov Telescope Array (CTA).